Valve



H; G. VANCE Nov. 12, 1940.

VALVE Original Filed May 39, 19.31

. REDUCED PRESSURE HIGH P8558085 aamm r I l ll glwuawtcya Patented Nov. 12, 194

VALVE Harvey G. Vance, St; Louis, Mo.

Ori inal application May 29, 1937, Serial" No.

145,612, now Patent No. 2,171 ',613, dated Septemf lier' 5, 1939.4 Divided andthis'applicationJuly 19,1939, SeriaI No. 285,399:

mam; (o1. asp-lair This invention relates to valves described and claimed in an application filed byme on May 29,

1937, Ser. No. 145,612, nowP'atent No. 2,171,613 granted Sept. 5, 1939, of whichth'e-present application is a division. 9 I

An object of the invention is the provision of a main valve for controlling the-flow offluid through a valve casingfor housing and which is automatically controlled by a pilot valve, the main valve being so mounted that it is adapted to rotate in a holder with a slight vertical movement so that the valve may be freely moved without the usual noisy chattering operation.

A further object of the invention is the provision of a main valve for controlling the flow of fluids through a housing in which the main valve is maintained on its seat by a holder and spring with means for retaining the valve in the holder while permitting rotation of the valve.

This invention will be best understood from a consideration of the following detailed description, in view of the accompanying drawing forming a part of the specification; nevertheless, it is to be understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications as define no material departure from the salient features of the invention as expressed in the appended claim.

In the drawing:

Figure 1 is a vertical sectional view of a valve housing showing my valve incorporated therein,

Figure 2 is a horizontal section taken along the line 2-2 of Fig. 1 with parts broken away, and

Figure 3 is a view in perspective of the valve and holder in separated relation.

Referring more particularly to the drawing, I!) generally designates a housing for a main valve II. This housing has an inlet passage I2 for high pressure fluid and an outlet'passage [3.

A diaphragm I4 is secured at its periphery between the upper end l5 of the housing and a cover plate IS in any approved manner. A pilot valve housing generally designated by the numeral I! is secured to the cover plate l6 and has its lower end in open communication with a chamber I8 formed between the cover plate [6 and the diaphragm I4, so that high pressure fluid which enters the chamber [8 from the pilot housing I! will act on the diaphragm I4 and force it downwardly against the tension of a spring l9, which has its upper end in engagement with a nut threaded onto a stem 2|. The opposite end of the spring rests upon a shoulder 22 of thehousing H). The stem 2|, it

will be noted, is slidably mounted in a passage 23 formed in the shoulder, 22.

The valve H at the lower end of the stem 2| is in the shape of a hard metal disc having on the underside at the exact center a semi-circular recess 2la.. At the periphery of the disc is cut an annular groove 24a sufficiently large to engage aJretaining means 25a in a cup-shaped holder 25 for loosely maintaining the disc in position in the holder.

The specially constructed cup-shaped member 25 supports the main valve H and is provided with a depending sleeve 26 which receives a post 21 carried by a base plate 28 connected to the housing by means of bolts 29. The cupshaped member has a greater diameter than the valve H and at the exact center of the bottom of the cup-shaped member is provided a semispherical projection 24 which is received by the recess 21a and upon which the valve disc ll may rotate.

The retaining means 25a in the form of pins or wires are attached to the side wallof the cup 25 or the ends of the wires are embedded in the side walls. The intermediate portions of the pins are slightly bowed inwardly and loosely fit within the groove 24min the periphery of the valve disc II. It will be seen that this specially constructed valve disc holder allows free movement of the valve disc in any direction with substantially little friction.

A ring seat 30 isfthreaded at 3| into an opening formed in a shoulder or partition 32. The

lower end of the seat is provided with an annular flange 33 against which the valve H is pressed by the action of a spring 34 and fluid pressure. The flange 33 acts as a seat for the valve H. The upper end of the spring is in engagement with the underface of the cup-shaped member 25, while the lower end of the spring rests upon the base 28 and surrounds the sleeve 23.

A pipe 35 is in open communication with an inlet pipe 36 which communicates with the inlet port l2. An outlet pipe 31 is adapted to carry off the fluid under reduced pressure from the housing of the pilot valve, as will be presently explained. This pipe, however, is connected with a discharge pipe 38 that is in communication with the outlet port l3 of the housing In.

The pilot valve construction as described and claimed in my co-pending application aboveentitled is located within the housing I! which is formed of thesections 40 and 4|. When pressure in the lower section 4| of the housing I! reaches a predetermined degree it will act on the diaphargm l4 and force said diaphragm downwardly against the tension of the spring I9. As the diaphragm is moved downwardly the lower end of the stem 2| acts on the upper face of the lower end 42 of the stem 2| seated within a socket 43 formed in the upper face of the valve ll so that when the stem 2| is depressed it will act on the valve H and force the same downwardly together with the cup-shaped holder 25 against the tension of the spring 34. The holder 25 and the valve Ii will be guided in their vertical downward movement by the sleeve 26 which is slidably mounted on the post 21 formed on the upper face of the closure plate 28 and the valve will be opened so that fluid under pressure will be admitted through the inlet passage l2 to the chamber 44 whence the fluid will be discharged through the outlet opening l3. It will be noted that the valve II has a recessed portion 2la at the center which is'received by the rounded projection 24 on the bottom of the holder 25 so that the valve H is rotatably mounted on this projection. The annulargroove 24a loosely receives the pins 25a: so that the valve will be held in position within the cup-shaped member but will be permitted to a slight movement vertically within the cup while the valve is permitted to revolve in said holder. By this construction the valve is substantially frictionless and will be seated promptly when the pressure has been released against the diaphragm I4 and the spring 34 will then move the cup-shaped holder upwardly and the valve on its seat on the lower end of the ring 30.

I claim:

A valve construction comprising a housing, a disc acting as a valve, a valve seat in the housing, a holder and guide for the disc, the holder at the upper end being provided with a cupshaped member to receive and house the disc. means on the cup-shaped member and disc for centering the disc in the said member, said disc having anannular groove in the side wall midway between the top and bottom faces of the disc and cooperating means on the cup-shaped member projecting into the groove at diametrically opposite points to provide for universal movement of said disc and for confining the disc in the cup-shaped member, a spring for urging the holder and disc toward the valve seat, said disc havinga centrally disposed socket and an operating rod for the valve havin the free end received within the socket so that as the rod is moved towards the disc it will exert pressure onthe disc in alinement with the cooperating means against the tension of the spring to force the disc away from the seat.

HARVEY G. VANCE. 

